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Date: Tue, 27 May 2014 14:34:12 +0300
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From: Vadim Blumkin <vadim.blumkin@gmail.com>
To: users@httpd.apache.org
Content-Type: multipart/alternative; boundary=001a1139fdda32f09904fa6013ee
Subject: [users@httpd] httpd apache- How to deal with large number of
 threads(multiple connections)

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Hello all,


First of all , this is my first question in this forum ,so if I am doing
something wrong ,please let me know .


As part of my job, I started using Apache 2.4.9 version on Windows
Platforms and one of our requirement is to support Signal-R and WebSockets
multiple connections.


Please correct me if I am wrong , but when using WS or SignalR, Apache
Server opens a new thread per single connection , means If I have 3000
clients connected to Apache , I need to create 3000 threads in the
configuration files:


LoadModule proxy_wstunnel_module modules/mod_proxy_wstunnel.so

ThreadLimit 6000

ThreadsPerChild 3000


My question is : what should be the correct configuration if my server need
to support , for example, 6000 clients connected simultaneously? Because ,
when I am setting ThreadsPerChild=6000 , the *httpd* process crashed
immediately .


Error that I am getting from apache log:

[mpm_winnt:crit] [pid 13932:tid 520] (OS 8)Unrecognized Win32 error code 8:
AH00355: Child: CreateThread failed. Unable to create all worker threads.
Created 2992 of the 6000 threads requested with the ThreadsPerChild
confiuration directive.


Is it possible to support such number of threads ? Or is it possible to
increase the number of threads as needed during the run time ?


Some more technical information:


Apache Version :2.4.9 (32 bit)

OS: Windows Server 2008R2 (64 bit)

Using mpm_winnt module.


I  very appreciate any help and feedback .


Thanks and regards,

Vadim

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<div dir=3D"ltr"><p class=3D"MsoNormal">Hello all,</p>

<p class=3D"MsoNormal">=C2=A0</p>

<p class=3D"MsoNormal">First of all , this is my first question in this for=
um ,so
if I am doing something wrong ,please let me know .</p>

<p class=3D"MsoNormal">=C2=A0</p>

<p class=3D"MsoNormal">As part of my job, I started using Apache 2.4.9 vers=
ion on
Windows Platforms and one of our requirement is to support Signal-R and Web=
Sockets
multiple connections.</p>

<p class=3D"MsoNormal">=C2=A0</p>

<p class=3D"MsoNormal">Please correct me if I am wrong , but when using WS =
or
SignalR, Apache Server opens a new thread per single connection , means If =
I
have 3000 clients connected to Apache , I need to create 3000 threads in th=
e
configuration files:</p>

<p class=3D"MsoNormal">=C2=A0</p>

<p class=3D"MsoNormal">LoadModule proxy_wstunnel_module
modules/mod_proxy_wstunnel.so</p>

<p class=3D"MsoNormal">ThreadLimit 6000</p>

<p class=3D"MsoNormal">ThreadsPerChild 3000</p>

<p class=3D"MsoNormal">=C2=A0</p>

<p class=3D"MsoNormal">My question is : what should be the correct configur=
ation if
my server need to support , for example, 6000 clients connected simultaneou=
sly?
Because , when I am setting ThreadsPerChild=3D6000 , the <b>httpd</b> proce=
ss
crashed immediately .</p>

<p class=3D"MsoNormal">=C2=A0</p>

<p class=3D"MsoNormal">Error that I am getting from apache log:</p>

<p class=3D"MsoNormal"><span style=3D"color:red">[mpm_winnt:crit] [pid 1393=
2:tid 520]
(OS 8)Unrecognized Win32 error code 8: AH00355: Child: CreateThread failed.
Unable to create all worker threads. Created 2992 of the 6000 threads reque=
sted
with the ThreadsPerChild confiuration directive.</span></p>

<p class=3D"MsoNormal">=C2=A0</p>

<p class=3D"MsoNormal">Is it possible to support such number of threads ? O=
r is it
possible to increase the number of threads as needed during the run time ?<=
/p>

<p class=3D"MsoNormal">=C2=A0</p>

<p class=3D"MsoNormal">Some more technical information:</p>

<p class=3D"MsoNormal">=C2=A0</p>

<p class=3D"MsoNormal">Apache Version :2.4.9 (32 bit)</p>

<p class=3D"MsoNormal">OS: Windows Server 2008R2 (64 bit)</p>

<p class=3D"MsoNormal">Using mpm_winnt module.</p>

<p class=3D"MsoNormal">=C2=A0</p>

<p class=3D"MsoNormal">I=C2=A0 very appreciate any
help and feedback .</p>

<p class=3D"MsoNormal">=C2=A0</p>

<p class=3D"MsoNormal">Thanks and regards,</p>

<p class=3D"MsoNormal">Vadim</p></div>

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